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 * Copyright (c) 2019, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.oracle.svm.core.jni.access;

import org.graalvm.collections.EconomicSet;
import org.graalvm.nativeimage.Platform;
import org.graalvm.nativeimage.Platforms;

import com.oracle.svm.core.BuildPhaseProvider.ReadyForCompilation;
import com.oracle.svm.core.heap.UnknownObjectField;

abstract class JNIAccessibleMember {
    private final JNIAccessibleClass declaringClass;

    @UnknownObjectField(fullyQualifiedTypes = "org.graalvm.collections.EconomicMapImpl", canBeNull = true, availability = ReadyForCompilation.class) //
    private EconomicSet<Class<?>> hidingSubclasses;

    JNIAccessibleMember(JNIAccessibleClass declaringClass) {
        this.declaringClass = declaringClass;
    }

    public JNIAccessibleClass getDeclaringClass() {
        return declaringClass;
    }

    boolean isDiscoverableIn(Class<?> clazz) {
        Class<?> declaring = declaringClass.getClassObject();
        assert clazz != null && declaring.isAssignableFrom(clazz);
        if (hidingSubclasses != null && !clazz.equals(declaring)) {
            if (hidingSubclasses.contains(clazz)) {
                return false;
            }
            if (declaring.isInterface()) {
                for (Class<?> iface : clazz.getInterfaces()) {
                    if (declaring.isAssignableFrom(iface) && !isDiscoverableIn(iface)) {
                        return false;
                    }
                }
            }
            Class<?> sup = clazz.getSuperclass();
            if (sup != null && declaring.isAssignableFrom(sup) && !isDiscoverableIn(sup)) {
                return false;
            }
        }
        return true;
    }

    @Platforms(Platform.HOSTED_ONLY.class)
    protected void setHidingSubclasses(EconomicSet<Class<?>> hidingSubclasses) {
        assert this.hidingSubclasses == null;
        this.hidingSubclasses = hidingSubclasses;
    }
}
